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Eric Foner says Abraham Lincoln didn't see slavery as a fundamental problem confronting America until well into his career.
Christiane Amanpour brings a gift for Christiane Aman-purr and believes Egypt's democratic uprising will last. David Albright explains why no one will take credit for setting back the Iranian nuclear program with Stuxnet.
H. Jeffrey Leonard explains the impact of big companies' late payment policies on small business.